package com.zestinn.smart4j.framework.util;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

/**
 * @author zestinn
 * @create 2017-09-26 13:36
 */
public final class PropsUtil {
    private static final Logger LOGGER = LoggerFactory.getLogger(PropsUtil.class);

    /**
     * 加载属性文件
     */
    public static Properties loadProperties(String fileName){
        Properties props = null;
        InputStream is = null;
        try{
            is = Thread.currentThread().getContextClassLoader().getResourceAsStream(fileName);
            if (is == null){
                throw new FileNotFoundException(fileName  + "file is not found");
            }
            props = new Properties();
            props.load(is);
        }catch (IOException e){
            LOGGER.error("load peoperties file failure", e);
        } finally {
            if (is != null){
                try {
                    is.close();
                } catch (IOException e){
                    LOGGER.error("close input stream failure", e);
                }
            }
        }
        return props;
    }

    /**
     * 获取字符串属性，默认值为""
     * @param props
     * @param key
     * @return
     */
    public static String getString(Properties props, String key) {
        String value = "";
        if (props.contains(key)) {
            value = props.getProperty(key);
        }
        return value;
    }

    /**
     * 获取字符串属性，可以设置默认值
     */
    public static String getString(Properties props, String key, String defaultValue){
        String value = defaultValue;
        if (props.contains(key)){
            value = props.getProperty(key);
        }
        return value;
    }

    /**
     * 获取数值型属性（默认值为0）
     */
    public int getInt(Properties props, String key){
        return getInt(props, key, 0);
    }

    /**
     * 获取数值型属性 （可指定默认值）
     * @return
     */
    public int getInt(Properties props, String key, int defaultValue) {
        int value = defaultValue;
        if (props.contains(key)){
            value = CastUtil.castInt(props.get(key));
        }
        return value;
    }

    /**
     * 获取布尔值属性（默认值为 false）
     */
    public static boolean getBoolean(Properties props, String key){
        return getBoolean(props, key, false);
    }

    /**
     * 获取布尔值属性（可指定默认值）
     */
    public static boolean getBoolean(Properties props, String key, boolean defaultValue) {
        boolean value = defaultValue;
        if (props.contains(key)){
            value = CastUtil.castBoolean(props.getProperty(key));
        }
        return value;
    }


}
